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Rockwell Automation Publication 1606-RM109A-EN-P - August 2020
Power Supply —12V, 10 A, 120 W, Single Phase
Lifetime Expectancy
The Lifetime expectancy shown in the table indicates the minimum operating
hours (service life) and is determined by the lifetime expectancy of the built-in
electrolytic capacitors. Lifetime expectancy is specified in operational hours
and is calculated according to the capacitor’s manufacturer specification. The
manufacturer of the electrolytic capacitors only guarantees a maximum life of
up to 15 years (131,400 hr). Any number exceeding this value is a calculated
theoretical lifetime which can be used to compare devices.
Mean Time Between Failure
Mean Time Between Failure (MTBF), is calculated according to statistical
device failures, and indicates reliability of a device. It is the statistical
representation of the likelihood of a unit to fail and does not necessarily
represent the life of a product.
An MTBF figure such as, 1,000,000 hr means that statistically one unit will fail
every 100 hours if 10,000 units are installed in the field. However, it can not be
determined if the failed unit has been running for 50,000 hr or only
for 100 hr.
For these types of units the MTTF (Mean Time To Failure) value is the same
value as the MTBF value.
Lifetime Expectancy
AC 100V
AC 120V
AC 230V
Notes
284,000 hr
297,000 hr
294,000 hr
At 12V, 5 A and 40 °C (104 °F)
804,000 hr
839,000 hr
833,000 hr
At 12V, 5 A and 25 °C (77 °F)
88,000 hr
94,000 hr
110,000 hr
At 12V, 10 A and 40°C (104 °F)
248,000 hr
267,000 hr
311,000 hr
At 12V, 10 A and 25 °C (77 °F)
44,000 hr
51,000 hr
61,000 hr
At 12V, 12 A and 40 °C (104 °F)
126,000 hr
143,000 hr
171,000 hr
At 12V, 12 A and 25 °C (77 °F)
AC 100V
AC 120V
AC 230V
Notes
MTBF SN 29500, IEC 61709
682,000 hr
687,000 hr
732,000 hr
At 12V, 10 A and 40 °C (104 °F)
1,212,000 hr
1,221,000 hr
1,294,000 hr
At 12V, 10 A and 25°C (77 °F)
MTBF MIL HDBK 217F
287,000 hr
290,000 hr
308,000 hr
At 12V, 10 A and 40 °C (104 °F);
Ground Benign GB40
417,000 hr
421,000 hr
447,000 hr
At 12V, 10 A and 25 °C (77 °F);
Ground Benign GB25
68,000 hr
69,000 hr
73,000 hr
At 12V, 10 A and 40 °C (104 °F);
Ground Fixed GF40
91,000 hr
93,000 hr
99,000 hr
At 12V, 10 A and 25 °C (77 °F);
Ground Fixed GF25
